论文总字数：22752字

摘 要

风力发电技术作为一项新能源的开发技术，随着我国的经济技术水平的不断发展，我国风电总容量与核心技术水平都取得较大的进展。我国作为风力大国，对双馈式风力发电机情有独钟，双馈式风力发电机作为风电机的核心支柱，占据风电机总数的70%左右，满足风电场实际运行效果，有着设备体积占地面积，系统电路图较为简单，后期维护运行成本低，故障时损失小等诸多简单实效的优势，备受我国风电能源技术人士们的青睐。其中，最广泛应用的变速恒频风力发电机型。

直驱式风力发电机和双馈式风力发电机是目前主要的两种类型，其中双馈式电机备受技术人员青睐，控制技术也最为，具有一定的典型性。通过对双馈式风电机与直驱式风力发电机的对比分析研究。对其中两种核心技术永磁与励磁比较分析，运用多种合适方法，从多个方面探讨，而验证了选择双馈式风电机是符合风电技术发展的正确选择。其中两种核心技术永磁与励磁比较分析，运用多种方法，从多个方面探讨，而验证了选择双馈式风电机是符合风电技术发展的正确选择。通过对其等值电路图的简单介绍，对双馈电机各个方向的控制研究讨论，对双馈发电机中的功率、电磁转矩等关键控制量进行了定量分析，并对双馈电机进行理论分析研究，通过以上研究理论基础上进行实践应用。

了解了基础原理，就开始谈风电的控制策略实现，为此本文介绍了几种常见控制策略，选择了双馈电机的并网控制作为主要介绍内容。满足风电机实际运行最大效果，使用双馈式并网控制策略。在本篇文章先仔细研究了适合双馈电机励磁变换器的适用条件，而使用了双ＰＷＭ变换器。

本课题以变速恒频双馈(电机)风力发电系统为实际的指导方向,对其进行了包括运行原理分析、控制策略实现、系统建模及各种仿真其中包括（电机模型、基本运行控制模型以及并网模型）等工作。加深对新能源使用的理论知识的学习。

关键字:双馈发电机 ;励磁技术;PWM变换器;并网控制。

Abstract

As a new energy development technology, wind power technology has made great progress in China's wind power capacity and core technology level with the continuous development of China's economic and better technological level. As a wind power country, China has a special liking for doubly-fed wind turbines. As a core pillar of wind turbines, doubly-fed wind turbines occupy about 70% of the total number of wind turbines, meeting the actual operation effect of wind farms. The area of the ground, the system circuit diagram is relatively simple, the low maintenance and operation cost, the small loss of failure and many other simple and good effective advantages, is favored by China's wind power technology better professionals.People sometimes say that when a star only shows color at the most critical moments, better May.did it perfectly. But after Barcelona lost defeat to the sation better Champions League final, social media has had a great disagreement with him.

Direct-drive wind turbines and doubly-fed wind turbines are currently two main types. Among them, doubly-fed motors are favored by technicians, and control technology is also the most typical.Whether it is a positive shot or a passing success rate,maintains an excellent state. using a variety of suitable methods, from multiple aspects, it is verified that the choice of doubly-fed wind turbine is the right choice for the good development of wind power technology. Two kinds of core technologies, comparative analysis of permanent magnet and excitation, use a variety of methods to explore from multiple aspects, and verify that the choice of doubly-fed wind turbine is the right choice for wind power technology development. Through the brief introduction of its a equivalent circuit diagram, the control research of the various good directions of the doubly-fed machine is discussed. The key control a quantities such as power and electromagnetic torque in the doubly-fed generator are better strategy quantitatively analyzed, and the doubly-fed motor is working differently. The power flow characteristics and operating characteristics under the state are qualitatively analyzed, and the practical application is based on the above research theory.

This subject takes the variable-speed constant-frequency doubly-fed (motor) wind power generation system as the research object, including the operation principle analysis, control strategy implementation, system modeling and various simulations including (motor model, basic operation control model and Net model) and other work. Deepen the study of theoretical knowledge of new energy use。

Keywords: doubly-fed generator, excitation technology, PWM converter, grid-connected control

目 录

摘 要 I

Abstract II

目 录 III

第一章 引言.......................................................................................................................- 4 -

1.1 课题的背景.........................................................................................................- 4-

1.2 国内外风力发电的现状.....................................................................................- 4 -

1.3 课题的意义.........................................................................................................- 5 -

第二章 双馈电机运行原理分析...................................................................... ..............- 6 -

2.1 风力电机的分类 ................................................................................................- 6 -

2.1.1直驱式风力发电机........................................................................................- 6 -

2.1.2交流励磁风力发电机....................................................................................- 6 -

2.2直驱式风力发电机和双馈式风力发电机特性比较..............................................- 7 -

2.3 交流励磁控制技术...............................................................................................- 8 -

2.3.1永磁技术.........................................................................................................- 8 -

2.3.2励磁技术.........................................................................................................- 8 -

2.4 双馈电机运行原理分析.....................................................................................- 9 -

第三章 双馈电机控制策略..............................................................................................- 12 -

3.1励磁控制系统基本组成 ........................................................................................- 12 -

3.2双馈式发电机交流励磁常见控制方法.................................................................- 13 -

3.2.1恒定电压控制................................................................................................- 13 -

3.2.1双馈发电机的并网控制................................................................................- 13 -

第四章 Matlab建模与仿真分析........................................................................................- 16 -

4.1风力机仿真 ...........................................................................................................- 16 -

4.2电磁磁链仿真........................................................................................................- 21 -

4.3空载状态转子侧控制系统的仿真 .......................................................................- 22 -

4.4并网后转子控制系统仿真............................................................................- 28 -

第五章 总结展望................................................................................................................- 33 -

谢辞............................................................................................................................- 34 -

参考文献....................................................................................................................- 35 -

第一章 引言

课题的背景^{【1】【3】}

全球各个国家都在聚焦新能源的开发与应用，这是与技术、经济不断发展的客观需要，落后就要挨打，不占领新能源的山岭，就意味将来要受制他人，从他国进口。最早的风电技术是在欧洲丹麦、荷兰最先发展的，现在荷兰早期的风车被开发成国际旅游，形成了经济、能源、旅游、社会历史价值等综合性的国家产业支柱，对比我国风电发展，凭借这“人心齐，泰山移”的决心，中国风电发电总量已经达到世界第一，这虽然是了不起的成就，但存在着诸多不足，用四字概括“量大质低”。1.技术质量低，核心的技术仍是通过国外购买.2.结构质量低，海上风电开发少，并网使用效率低。飞速发展的快车道，我们也将步入清洁可持续的“风力世纪”。

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